Difference between revisions of "OfflineIMAP"

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{{Article summary end}}
 
{{Article summary end}}
 
[http://offlineimap.org/ OfflineIMAP] is a Python utility to sync mail from IMAP servers. It does not work with the POP3 protocol or mbox, and is usually paired with a MUA such as [[Mutt]].
 
[http://offlineimap.org/ OfflineIMAP] is a Python utility to sync mail from IMAP servers. It does not work with the POP3 protocol or mbox, and is usually paired with a MUA such as [[Mutt]].
 +
 
==Installing==
 
==Installing==
Install {{pkg|offlineimap}} from the [[official repositories]]
+
 
 +
Install {{pkg|offlineimap}} from the [[official repositories]]. For a development version, install {{AUR|offlineimap-git}} from [[AUR]].
  
 
==Configuring==
 
==Configuring==
 +
 
Offlineimap is distributed with two default configuration files, which are both located in {{ic|/usr/share/offlineimap/}}. {{ic|offlineimap.conf}} contains every setting and is thorougly documented. Alternatively, {{ic|offlineimap.conf.minimal}} is not commented and only contains a small number of settings (see: [[#Minimal|Minimal]]).
 
Offlineimap is distributed with two default configuration files, which are both located in {{ic|/usr/share/offlineimap/}}. {{ic|offlineimap.conf}} contains every setting and is thorougly documented. Alternatively, {{ic|offlineimap.conf.minimal}} is not commented and only contains a small number of settings (see: [[#Minimal|Minimal]]).
  
Line 17: Line 20:
  
 
===Minimal===
 
===Minimal===
 +
 
The following file is a commented version of {{ic|offlineimap.conf.minimal}}.
 
The following file is a commented version of {{ic|offlineimap.conf.minimal}}.
{{hc|~/.offlineimaprc|2=
+
 
<nowiki>
+
{{hc|~/.offlineimaprc|<nowiki>
 
[general]
 
[general]
 
# List of accounts to be synced, separated by a comma.
 
# List of accounts to be synced, separated by a comma.
Line 43: Line 47:
 
remotehost = host.domain.tld
 
remotehost = host.domain.tld
 
remoteuser = username
 
remoteuser = username
</nowiki>
+
</nowiki>}}
}}
+
  
 
==Usage==
 
==Usage==
 +
 
Before running offlineimap, create any parent directories that were allocated to local repositories:
 
Before running offlineimap, create any parent directories that were allocated to local repositories:
 
  $ mkdir ~/Maildir
 
  $ mkdir ~/Maildir
Line 53: Line 57:
 
  $ offlineimap
 
  $ offlineimap
  
Mail accounts will now be synced. If anything goes wrong, take a closer look at the error messages. OfflineIMAP is usually very verbose about problems; partly because the developers didn't bother with taking away tracebacks from the final product.
+
Mail accounts will now be synced. If anything goes wrong, take a closer look at the error messages. OfflineIMAP is usually very verbose about problems; partly because the developers did not bother with taking away tracebacks from the final product.
  
 
==Miscellaneous==
 
==Miscellaneous==
''Various settings and improvements''
 
  
 
===Running offlineimap in the background===
 
===Running offlineimap in the background===
 +
 
Most other mail transfer agents assume that the user will be using the tool as a [[daemon]] by making the program sync periodically by default. In offlineimap, there are a few settings that control backgrounded tasks.
 
Most other mail transfer agents assume that the user will be using the tool as a [[daemon]] by making the program sync periodically by default. In offlineimap, there are a few settings that control backgrounded tasks.
  
 
Confusingly, they are spread thin all-over the configuration file:
 
Confusingly, they are spread thin all-over the configuration file:
{{hc|~/.offlineimaprc|2=
+
 
<nowiki>
+
{{hc|~/.offlineimaprc|<nowiki>
 
# In the general section
 
# In the general section
 
[general]
 
[general]
Line 90: Line 94:
 
is not set.
 
is not set.
 
holdconnectionopen = yes
 
holdconnectionopen = yes
</nowiki>
+
</nowiki>}}
}}
+
  
 
====systemd Service====
 
====systemd Service====
 +
 
# Configure background jobs as shown in [[#Running offlineimap in the background]].
 
# Configure background jobs as shown in [[#Running offlineimap in the background]].
 
# Writing a systemd service runnable as an user.
 
# Writing a systemd service runnable as an user.
{{hc|/etc/systemd/system/offlineimap@.service|2=
+
 
<nowiki>
+
{{hc|/etc/systemd/system/offlineimap@.service|<nowiki>
 
[Unit]
 
[Unit]
 
Description=Start offlineimap as a daemon
 
Description=Start offlineimap as a daemon
Line 106: Line 110:
 
User=%i
 
User=%i
 
ExecStart=/usr/bin/offlineimap
 
ExecStart=/usr/bin/offlineimap
 +
KillSignal=SIGUSR2
 
Restart=always
 
Restart=always
  
 
[Install]
 
[Install]
 
WantedBy=multi-user.target
 
WantedBy=multi-user.target
</nowiki>
+
</nowiki>}}
}}
+
  
 
====cron job====
 
====cron job====
 +
 
1. Configure background jobs as shown in [[#Running offlineimap in the background]].
 
1. Configure background jobs as shown in [[#Running offlineimap in the background]].
  
 
2. Use a log-friendly user interface:
 
2. Use a log-friendly user interface:
{{hc|~/.offlineimaprc|2=
+
 
<nowiki>
+
{{hc|~/.offlineimaprc|<nowiki>
 
[general]
 
[general]
 
# This will suppress anything but errors
 
# This will suppress anything but errors
 
ui = quiet
 
ui = quiet
</nowiki>
+
</nowiki>}}
}}
+
  
 
3. Write a wrapper script for [[daemon]]izing programs, or use the one shown below:
 
3. Write a wrapper script for [[daemon]]izing programs, or use the one shown below:
{{hc|/usr/local/bin/start_daemon|2=
+
 
<nowiki>
+
{{hc|/usr/local/bin/start_daemon|<nowiki>
 
#!/bin/sh
 
#!/bin/sh
  
Line 164: Line 168:
  
 
exec $cmd
 
exec $cmd
</nowiki>
+
</nowiki>}}
}}
+
  
 
4. Finally, add a crontab entry:
 
4. Finally, add a crontab entry:
Line 175: Line 178:
  
 
===Automatic mutt mailbox generation===
 
===Automatic mutt mailbox generation===
 +
 
[[Mutt]] cannot be simply pointed to an IMAP or maildir directory and be expected to guess which subdirectories happen to be the mailboxes, yet offlineimap can generate a muttrc fragment containing the mailboxes that it syncs.
 
[[Mutt]] cannot be simply pointed to an IMAP or maildir directory and be expected to guess which subdirectories happen to be the mailboxes, yet offlineimap can generate a muttrc fragment containing the mailboxes that it syncs.
{{hc|~/.offlineimaprc|2=
+
 
<nowiki>
+
{{hc|~/.offlineimaprc|<nowiki>
 
[mbnames]
 
[mbnames]
 
enabled = yes
 
enabled = yes
Line 185: Line 189:
 
sep = " "
 
sep = " "
 
footer = "\n"
 
footer = "\n"
</nowiki>
+
</nowiki>}}
}}
+
  
 
Then add the following lines to {{ic|~/.mutt/muttrc}}.
 
Then add the following lines to {{ic|~/.mutt/muttrc}}.
  
{{hc|~/.mutt/muttrc|2=
+
{{hc|~/.mutt/muttrc|<nowiki>
<nowiki>
+
 
# IMAP: offlineimap
 
# IMAP: offlineimap
 
set folder = "~/Mail"
 
set folder = "~/Mail"
Line 198: Line 200:
 
set record = "+account/Sent\ Items"
 
set record = "+account/Sent\ Items"
 
set postponed = "+account/Drafts"
 
set postponed = "+account/Drafts"
</nowiki>
+
</nowiki>}}
}}
+
  
 
{{ic|account}} is the name you have given to your IMAP account in {{ic|~/.offlineimaprc}}.
 
{{ic|account}} is the name you have given to your IMAP account in {{ic|~/.offlineimaprc}}.
  
 
===Gmail configuration===
 
===Gmail configuration===
 +
 
This remote repository is configured specifically for Gmail support, substituting folder names in uppercase for lowercase, among other small additions. Keep in mind that this configuration does not sync the ''All Mail'' folder, since it is usually unnecessary and skipping it prevents bandwidth costs:
 
This remote repository is configured specifically for Gmail support, substituting folder names in uppercase for lowercase, among other small additions. Keep in mind that this configuration does not sync the ''All Mail'' folder, since it is usually unnecessary and skipping it prevents bandwidth costs:
  
{{hc|~/.offlineimaprc|2=
+
{{hc|~/.offlineimaprc|<nowiki>
<nowiki>
+
 
[Repository gmail-remote]
 
[Repository gmail-remote]
 
type = Gmail
 
type = Gmail
Line 219: Line 220:
 
# Necessary as of OfflineIMAP 6.5.4
 
# Necessary as of OfflineIMAP 6.5.4
 
sslcacertfile = /etc/ssl/certs/ca-certificates.crt
 
sslcacertfile = /etc/ssl/certs/ca-certificates.crt
</nowiki>
+
</nowiki>}}
 +
 
 +
{{Note|
 +
* If you have Gmail set to another language, the folder names may appear translated too, e.g. "verzonden_berichten" instead of "sent_mail".
 +
* After version 6.3.5, offlineimap also creates remote folders to match your local ones. Thus you may need a nametrans rule for your local repository too that reverses the effects of this nametrans rule.
 +
* As of 1 October 2012 gmail SSL certificate fingerprint is not always the same. This prevents from using {{ic|cert_fingerprint}} and makes the {{ic|sslcacertfile}} way a better solution for the SSL verification (see [[OfflineIMAP#SSL fingerprint does not match]]).
 
}}
 
}}
 
{{Note|If you have Gmail set to another language, the folder names may appear translated too, e.g. "verzonden_berichten" instead of "sent_mail".}}
 
 
{{Note|After version 6.3.5, offlineimap also creates remote folders to match your local ones. Thus you may need a nametrans rule for your local repository too that reverses the effects of this nametrans rule.}}
 
 
{{Note|As of 1 October 2012 gmail SSL certificate fingerprint is not always the same. This prevents from using {{ic|cert_fingerprint}} and makes the {{ic|sslcacertfile}} way a better solution for the SSL verification (see [[OfflineIMAP#SSL fingerprint does not match]]).}}
 
  
 
===Not having to enter the password all the time===
 
===Not having to enter the password all the time===
 +
 
====.netrc====
 
====.netrc====
 +
 
Add the following lines to your {{ic|~/.netrc}}:
 
Add the following lines to your {{ic|~/.netrc}}:
  
    machine hostname.tld
+
machine hostname.tld
    login [your username]
+
    login [your username]
    password [your password]
+
    password [your password]
  
Don't forget to give the file appropriate rights like 600 or 700:
+
Do not forget to give the file appropriate rights like 600 or 700:
  chmod 600 ~/.netrc
+
$ chmod 600 ~/.netrc
  
 
====Gnome Keyring====
 
====Gnome Keyring====
 +
 
http://www.clasohm.com/blog/one-entry?entry_id=90957 gives an example of how to use gnome-keyring to store the password.  
 
http://www.clasohm.com/blog/one-entry?entry_id=90957 gives an example of how to use gnome-keyring to store the password.  
  
Line 246: Line 249:
 
Alternatively, if youre using {{AUR|gnome-keyring-query}}, you can use this simpler python file:
 
Alternatively, if youre using {{AUR|gnome-keyring-query}}, you can use this simpler python file:
  
    #!/usb/bin/python
+
{{bc|<nowiki>
    # executes gnome-keyring-query get passwd
+
#!/usb/bin/python
    # and returns the output
+
# executes gnome-keyring-query get passwd
   
+
# and returns the output
    import locale
+
 
    from subprocess import Popen, PIPE
+
import locale
   
+
from subprocess import Popen, PIPE
    encoding = locale.getdefaultlocale()[1]
+
 
   
+
encoding = locale.getdefaultlocale()[1]
    def get_password(p):
+
 
        (out, err) = Popen(["gnome-keyring-query", "get", p], stdout=PIPE).communicate()
+
def get_password(p):
        return out.decode(encoding).strip()
+
    (out, err) = Popen(["gnome-keyring-query", "get", p], stdout=PIPE).communicate()
 +
    return out.decode(encoding).strip()
 +
</nowiki>}}
  
 
====python2-keyring====
 
====python2-keyring====
There's a general solution that should work for any keyring. Install [http://pypi.python.org/pypi/keyring python2-keyring] from [[AUR]], then change  your ~/.offlineimaprc to say something like:
 
  
{{bc|1=
+
There is a general solution that should work for any keyring. Install [http://pypi.python.org/pypi/keyring python2-keyring] from [[AUR]], then change  your ~/.offlineimaprc to say something like:
 +
 
 +
{{bc|<nowiki>
 
[general]
 
[general]
 
pythonfile = /home/user/offlineimap.py
 
pythonfile = /home/user/offlineimap.py
+
...
 
[Repository RemoteEmail]
 
[Repository RemoteEmail]
 
remoteuser = username@host.net
 
remoteuser = username@host.net
 
remotepasseval = keyring.get_password("offlineimap","username@host.net")
 
remotepasseval = keyring.get_password("offlineimap","username@host.net")
+
...
}}
+
</nowiki>}}
  
 
and somewhere in ~/offlineimap.py add {{ic|import keyring}}. Now all you have to do is set your password, like so:
 
and somewhere in ~/offlineimap.py add {{ic|import keyring}}. Now all you have to do is set your password, like so:
Line 278: Line 284:
 
>>> keyring.set_password("offlineimap","username@host.net", "MYPASSWORD")}}
 
>>> keyring.set_password("offlineimap","username@host.net", "MYPASSWORD")}}
  
and it'll grab the password from your (kwallet/gnome-) keyring instead of having to keep it in plaintext or enter it each time.
+
and it will grab the password from your (kwallet/gnome-) keyring instead of having to keep it in plaintext or enter it each time.
  
 
====Emacs EasyPG====
 
====Emacs EasyPG====
 +
 
See http://www.emacswiki.org/emacs/OfflineIMAP#toc2
 
See http://www.emacswiki.org/emacs/OfflineIMAP#toc2
 +
 +
====KeePass / KeePassX====
 +
 +
Install {{AUR|python2-keepass-git}} from the AUR, then add the following to your offlineimap.py file:
 +
 +
{{bc|<nowiki>
 +
#!/usr/bin/python2
 +
import os, getpass
 +
from keepass import kpdb
 +
 +
def get_keepass_pw(dbpath, title="", username=""):
 +
    if os.path.isfile(dbpath):
 +
        db = kpdb.Database(dbpath, getpass.getpass("Master password for '" + dbpath +    "': "))
 +
        for entry in db.entries:
 +
            if (entry.title == title) and (entry.username == username):
 +
                return entry.password
 +
    else:
 +
        print "Error: '" + dbpath + "' does not exist."
 +
        return
 +
 +
</nowiki>}}
 +
(Credit to aki--aki: https://gist.github.com/aki--aki/5180359)
 +
 +
Next, edit your ~/.offlineimaprc:
 +
 +
{{bc|<nowiki>
 +
[general]
 +
# VVV Set this path correctly VVV
 +
pythonfile = /home/user/offlineimap.py
 +
...
 +
[Repository RemoteEmail]
 +
remoteuser = username@host.net
 +
# Set the DB path as well as the title and username of the specific entry you'd like to use.
 +
# This will prompt you on STDIN at runtime for the kdb master password.
 +
remotepasseval = get_keepass_pw("/path/to/database.kdb", title="<entry title>", username="<entry username>")
 +
...
 +
</nowiki>}}
 +
 +
Note that as-is, this does not support KDBs with keyfiles, only KDBs with password-only auth.
  
 
===Kerberos authentication===
 
===Kerberos authentication===
Install python2-kerberos from [https://aur.archlinux.org/packages.php?ID=50639 AUR] and do not specify remotepass in your .offlineimaprc.  
+
 
 +
Install {{AUR|python2-kerberos}} from [[AUR]] and do not specify remotepass in your .offlineimaprc.  
 
OfflineImap figure out the reset all if have a valid Kerberos TGT.  
 
OfflineImap figure out the reset all if have a valid Kerberos TGT.  
 
If you have 'maxconnections', it will fail for some connection. Comment 'maxconnections' out will solve this problem.
 
If you have 'maxconnections', it will fail for some connection. Comment 'maxconnections' out will solve this problem.
Line 291: Line 338:
  
 
===Overriding UI and autorefresh settings===
 
===Overriding UI and autorefresh settings===
 +
 
For the sake of troubleshooting, it is sometimes convenient to launch offlineimap with a more verbose UI, no background syncs and perhaps even a debug level:
 
For the sake of troubleshooting, it is sometimes convenient to launch offlineimap with a more verbose UI, no background syncs and perhaps even a debug level:
 
  $ offlineimap [ -o ] [ -d <debug_type> ] [ -u <ui> ]
 
  $ offlineimap [ -o ] [ -d <debug_type> ] [ -u <ui> ]
Line 304: Line 352:
 
{{Note|More recent versions use the following for <ui>: {{Ic|blinkenlights}}, {{Ic|ttyui}}, {{Ic|basic}}, {{Ic|quiet}} or {{Ic|machineui}}.}}
 
{{Note|More recent versions use the following for <ui>: {{Ic|blinkenlights}}, {{Ic|ttyui}}, {{Ic|basic}}, {{Ic|quiet}} or {{Ic|machineui}}.}}
  
===netrc authentication===
+
===Folder could not be created===
There are some bugs in the current {{Pkg|offlineimap}} which makes it impossible to read the authentication data from {{ic|~/.netrc}} if there are multiple Accounts per remote machine. ( see [http://comments.gmane.org/gmane.mail.imap.offlineimap.general/3024 Mail Archive ] ) But they are fixed in the GIT package {{AUR|offlineimap-git}} (note that is AUR package is flagged as out of date; see the current GitHub external link below).
+
Using the package you can collect all passwords in {{ic|~/.netrc}}. And do not forget to set it's access rights:
+
chmod 600 ~/.netrc
+
An example netrc file would be
+
{{hc|~/.netrc|
+
machine mail.myhost.de
+
    login mr_smith
+
    password secret
+
}}
+
  
===Folder could not be created===
 
 
In version 6.5.3, offlineimap gained the ability to create folders in the remote repository, as described [http://comments.gmane.org/gmane.mail.imap.offlineimap.general/4784 here].
 
In version 6.5.3, offlineimap gained the ability to create folders in the remote repository, as described [http://comments.gmane.org/gmane.mail.imap.offlineimap.general/4784 here].
  
Line 323: Line 361:
  
 
The solution is to provide an inverse {{Ic|nametrans}} lambda for the local repository, e.g.
 
The solution is to provide an inverse {{Ic|nametrans}} lambda for the local repository, e.g.
{{hc|~/.offlineimaprc|2=
+
 
<nowiki>
+
{{hc|~/.offlineimaprc|<nowiki>
 
[Repository foo-local]
 
[Repository foo-local]
 
nametrans = lambda foldername: foldername.replace('bar', 'BAR')
 
nametrans = lambda foldername: foldername.replace('bar', 'BAR')
Line 330: Line 368:
 
[Repository foo-remote]
 
[Repository foo-remote]
 
nametrans = lambda foldername: foldername.replace('BAR', 'bar')
 
nametrans = lambda foldername: foldername.replace('BAR', 'bar')
</nowiki>
+
</nowiki>}}
}}
+
  
 
* For working out the correct inverse mapping. the output of {{Ic|offlineimap --info}} should help.
 
* For working out the correct inverse mapping. the output of {{Ic|offlineimap --info}} should help.
Line 337: Line 374:
  
 
===SSL fingerprint does not match===
 
===SSL fingerprint does not match===
  ERROR: Server SSL fingerprint 'keykeykey' for hostname 'example.com' does not match configured fingerprint. Please verify and set 'cert_fingerprint' accordingly if not set yet.
+
 
 +
ERROR: Server SSL fingerprint 'keykeykey' for hostname 'example.com' does not match configured fingerprint. Please verify and set 'cert_fingerprint' accordingly if not set yet.
  
 
To solve this, add to {{ic|~/.offlineimaprc}} (in the same section as {{ic|1=ssl = yes}}) one of the following:
 
To solve this, add to {{ic|~/.offlineimaprc}} (in the same section as {{ic|1=ssl = yes}}) one of the following:
 
* either add {{ic|cert_fingerprint}}, with the certificate fingerprint of the remote server. This checks whether the remote server certificate matches the given fingerprint.
 
* either add {{ic|cert_fingerprint}}, with the certificate fingerprint of the remote server. This checks whether the remote server certificate matches the given fingerprint.
  cert_fingerprint = keykeykey
+
cert_fingerprint = keykeykey
 
* or add {{ic|sslcacertfile}} with the path to the system CA certificates file. Needs {{Pkg|ca-certificates}} installed. This validates the remote ssl certificate chain against the Certification Authorities in that file.
 
* or add {{ic|sslcacertfile}} with the path to the system CA certificates file. Needs {{Pkg|ca-certificates}} installed. This validates the remote ssl certificate chain against the Certification Authorities in that file.
  sslcacertfile = /etc/ssl/certs/ca-certificates.crt
+
sslcacertfile = /etc/ssl/certs/ca-certificates.crt
 +
 
 +
== See also ==
  
==External links==
 
 
* [http://lists.alioth.debian.org/mailman/listinfo/offlineimap-project Official OfflineIMAP mailing list]
 
* [http://lists.alioth.debian.org/mailman/listinfo/offlineimap-project Official OfflineIMAP mailing list]
 
* [http://roland.entierement.nu/blog/2010/09/08/gnus-dovecot-offlineimap-search-a-howto.html Gnus, Dovecot, OfflineIMAP, search: a HOWTO]
 
* [http://roland.entierement.nu/blog/2010/09/08/gnus-dovecot-offlineimap-search-a-howto.html Gnus, Dovecot, OfflineIMAP, search: a HOWTO]
** This setup worked for me, only difference being I had to add {{ic|1=mail_location = maildir:~/Maildir}} to {{ic|/etc/dovecot/dovecot.conf}}. Also, I used the [[OfflineIMAP#Gmail_configuration|Gmail configuration above]]. --[[User:Unhammer|Unhammer]] 09:24, 22 October 2010 (EDT)
+
* [http://pbrisbin.com/posts/mutt_gmail_offlineimap/ Mutt + Gmail + Offlineimap] - An outline of brisbin's simple gmail/mutt setup using cron to keep offlineimap syncing.
* [http://pbrisbin.com/posts/mutt_gmail_offlineimap/ Mutt + Gmail + Offlineimap]
+
** An outline of brisbin's simple gmail/mutt setup using cron to keep offlineimap syncing.
+
* [https://github.com/OfflineIMAP/offlineimap Current OfflineIMAP maintainer's fork on GitHub]
+
** Note that a strict build of this on current Arch will fail due to python references unless they are replaced with python2
+

Revision as of 20:12, 22 January 2014

Related help replacing me
isync
notmuch
msmtp

OfflineIMAP is a Python utility to sync mail from IMAP servers. It does not work with the POP3 protocol or mbox, and is usually paired with a MUA such as Mutt.

Installing

Install offlineimap from the official repositories. For a development version, install offlineimap-gitAUR from AUR.

Configuring

Offlineimap is distributed with two default configuration files, which are both located in /usr/share/offlineimap/. offlineimap.conf contains every setting and is thorougly documented. Alternatively, offlineimap.conf.minimal is not commented and only contains a small number of settings (see: Minimal).

Copy one of the default configuration files to ~/.offlineimaprc.

Note: Writing a comment after an option/value on the same line is invalid syntax, hence take care that comments are placed on their own separate line.

Minimal

The following file is a commented version of offlineimap.conf.minimal.

~/.offlineimaprc
[general]
# List of accounts to be synced, separated by a comma.
accounts = main

[Account main]
# Identifier for the local repository; e.g. the maildir to be synced via IMAP.
localrepository = main-local
# Identifier for the remote repository; i.e. the actual IMAP, usually non-local.
remoterepository = main-remote
# Status cache. Default is plain, which eventually becomes huge and slow.
status_backend = sqlite

[Repository main-local]
# Currently, offlineimap only supports maildir and IMAP for local repositories.
type = Maildir
# Where should the mail be placed?
localfolders = ~/Maildir

[Repository main-remote]
# Remote repos can be IMAP or Gmail, the latter being a preconfigured IMAP.
type = IMAP
remotehost = host.domain.tld
remoteuser = username

Usage

Before running offlineimap, create any parent directories that were allocated to local repositories:

$ mkdir ~/Maildir

Now, run the program:

$ offlineimap

Mail accounts will now be synced. If anything goes wrong, take a closer look at the error messages. OfflineIMAP is usually very verbose about problems; partly because the developers did not bother with taking away tracebacks from the final product.

Miscellaneous

Running offlineimap in the background

Most other mail transfer agents assume that the user will be using the tool as a daemon by making the program sync periodically by default. In offlineimap, there are a few settings that control backgrounded tasks.

Confusingly, they are spread thin all-over the configuration file:

~/.offlineimaprc
# In the general section
[general]
# Controls how many accounts may be synced simultaneously
maxsyncaccounts = 1

# In the account identifier
[Account main]
# Minutes between syncs
autorefresh = 5
# Number of quick-syncs between autorefreshes. Quick-syncs do not update if the
# only changes were to IMAP flags
quick = 10

# In the remote repository identifier
[Repository main-remote]
# Instead of closing the connection once a sync is complete, offlineimap will
# send empty data to the server to hold the connection open. A value of 60
# attempts to hold the connection for a minute between syncs (both quick and
# autorefresh).This setting has no effect if autorefresh and holdconnectionopen
# are not both set.
keepalive = 60
# OfflineIMAP normally closes IMAP server connections between refreshes if
# the global option autorefresh is specified.  If you wish it to keep the
# connection open, set this to true. This setting has no effect if autorefresh
is not set.
holdconnectionopen = yes

systemd Service

  1. Configure background jobs as shown in #Running offlineimap in the background.
  2. Writing a systemd service runnable as an user.
/etc/systemd/system/offlineimap@.service
[Unit]
Description=Start offlineimap as a daemon
Requires=network.target
After=network.target

[Service]
User=%i
ExecStart=/usr/bin/offlineimap
KillSignal=SIGUSR2
Restart=always

[Install]
WantedBy=multi-user.target

cron job

1. Configure background jobs as shown in #Running offlineimap in the background.

2. Use a log-friendly user interface:

~/.offlineimaprc
[general]
# This will suppress anything but errors
ui = quiet

3. Write a wrapper script for daemonizing programs, or use the one shown below:

/usr/local/bin/start_daemon
#!/bin/sh

set -efu

ionice_class=
ionice_priority=
nice=

while getopts c:p:n: f; do
	case $f in
	c) ionice_class=$OPTARG;;
	p) ionice_priority=$OPTARG;;
	n) nice=$OPTARG;;
	*) exit 2;;
	esac
done
shift $((OPTIND - 1))

cmd=$*
io=

if pgrep -u "$(id -u)" -xf -- "$cmd" >/dev/null 2>&1; then
	exit 0
fi

if type ionice >/dev/null 2>&1; then
	[ -n "$ionice_class" ]    && { io=1; cmd="-c $ionice_class $cmd"; }
	[ -n "$ionice_priority" ] && { io=1; cmd="-n $ionice_priority $cmd"; }
	[ -n "$io" ] && cmd="ionice $cmd"
fi

if type nice >/dev/null 2>&1; then
	[ -n "$nice" ] && cmd="nice -n $nice $cmd"
fi

exec $cmd

4. Finally, add a crontab entry:

$ crontab -e

The line should specify the interpreter for correct pgrep -xf results:

*/5 * * * * exec /usr/local/bin/start_daemon -n19 -c2 -p7 python2 /usr/bin/offlineimap

The wrapper script is needed because offlineimap has the tendency to sporadically crash, even more so when facing connection problems.

Automatic mutt mailbox generation

Mutt cannot be simply pointed to an IMAP or maildir directory and be expected to guess which subdirectories happen to be the mailboxes, yet offlineimap can generate a muttrc fragment containing the mailboxes that it syncs.

~/.offlineimaprc
[mbnames]
enabled = yes
filename = ~/.mutt/mailboxes
header = "mailboxes "
peritem = "+%(accountname)s/%(foldername)s"
sep = " "
footer = "\n"

Then add the following lines to ~/.mutt/muttrc.

~/.mutt/muttrc
# IMAP: offlineimap
set folder = "~/Mail"
source ~/.mutt/mailboxes
set spoolfile = "+account/INBOX"
set record = "+account/Sent\ Items"
set postponed = "+account/Drafts"

account is the name you have given to your IMAP account in ~/.offlineimaprc.

Gmail configuration

This remote repository is configured specifically for Gmail support, substituting folder names in uppercase for lowercase, among other small additions. Keep in mind that this configuration does not sync the All Mail folder, since it is usually unnecessary and skipping it prevents bandwidth costs:

~/.offlineimaprc
[Repository gmail-remote]
type = Gmail
remoteuser = user@gmail.com
remotepass = password
nametrans = lambda foldername: re.sub ('^\[gmail\]', 'bak',
                               re.sub ('sent_mail', 'sent',
                               re.sub ('starred', 'flagged',
                               re.sub (' ', '_', foldername.lower()))))
folderfilter = lambda foldername: foldername not in '[Gmail]/All Mail'
# Necessary as of OfflineIMAP 6.5.4
sslcacertfile = /etc/ssl/certs/ca-certificates.crt
Note:
  • If you have Gmail set to another language, the folder names may appear translated too, e.g. "verzonden_berichten" instead of "sent_mail".
  • After version 6.3.5, offlineimap also creates remote folders to match your local ones. Thus you may need a nametrans rule for your local repository too that reverses the effects of this nametrans rule.
  • As of 1 October 2012 gmail SSL certificate fingerprint is not always the same. This prevents from using cert_fingerprint and makes the sslcacertfile way a better solution for the SSL verification (see OfflineIMAP#SSL fingerprint does not match).

Not having to enter the password all the time

.netrc

Add the following lines to your ~/.netrc:

machine hostname.tld
    login [your username]
    password [your password]

Do not forget to give the file appropriate rights like 600 or 700:

$ chmod 600 ~/.netrc

Gnome Keyring

http://www.clasohm.com/blog/one-entry?entry_id=90957 gives an example of how to use gnome-keyring to store the password.

In the example, functions from a python file are imported in order to get passwords from gnome-keyring.

Alternatively, if youre using gnome-keyring-queryAUR, you can use this simpler python file:

#!/usb/bin/python
# executes gnome-keyring-query get passwd
# and returns the output

import locale
from subprocess import Popen, PIPE

encoding = locale.getdefaultlocale()[1]

def get_password(p):
    (out, err) = Popen(["gnome-keyring-query", "get", p], stdout=PIPE).communicate()
    return out.decode(encoding).strip()

python2-keyring

There is a general solution that should work for any keyring. Install python2-keyring from AUR, then change your ~/.offlineimaprc to say something like:

[general]
pythonfile = /home/user/offlineimap.py
...
[Repository RemoteEmail]
remoteuser = username@host.net
remotepasseval = keyring.get_password("offlineimap","username@host.net")
...

and somewhere in ~/offlineimap.py add import keyring. Now all you have to do is set your password, like so:

$ python2 
>>> import keyring
>>> keyring.set_password("offlineimap","username@host.net", "MYPASSWORD")

and it will grab the password from your (kwallet/gnome-) keyring instead of having to keep it in plaintext or enter it each time.

Emacs EasyPG

See http://www.emacswiki.org/emacs/OfflineIMAP#toc2

KeePass / KeePassX

Install python2-keepass-gitAUR from the AUR, then add the following to your offlineimap.py file:

#!/usr/bin/python2
import os, getpass
from keepass import kpdb
 
def get_keepass_pw(dbpath, title="", username=""):
    if os.path.isfile(dbpath):
        db = kpdb.Database(dbpath, getpass.getpass("Master password for '" + dbpath +    "': "))
        for entry in db.entries:
            if (entry.title == title) and (entry.username == username):
                return entry.password
    else:
        print "Error: '" + dbpath + "' does not exist."
        return

(Credit to aki--aki: https://gist.github.com/aki--aki/5180359)

Next, edit your ~/.offlineimaprc:

[general]
# VVV Set this path correctly VVV
pythonfile = /home/user/offlineimap.py
...
[Repository RemoteEmail]
remoteuser = username@host.net
# Set the DB path as well as the title and username of the specific entry you'd like to use.
# This will prompt you on STDIN at runtime for the kdb master password.
remotepasseval = get_keepass_pw("/path/to/database.kdb", title="<entry title>", username="<entry username>")
...

Note that as-is, this does not support KDBs with keyfiles, only KDBs with password-only auth.

Kerberos authentication

Install python2-kerberosAUR from AUR and do not specify remotepass in your .offlineimaprc. OfflineImap figure out the reset all if have a valid Kerberos TGT. If you have 'maxconnections', it will fail for some connection. Comment 'maxconnections' out will solve this problem.

Troubleshooting

Overriding UI and autorefresh settings

For the sake of troubleshooting, it is sometimes convenient to launch offlineimap with a more verbose UI, no background syncs and perhaps even a debug level:

$ offlineimap [ -o ] [ -d <debug_type> ] [ -u <ui> ]
-o
Disable autorefresh, keepalive, etc.
-d <debug_type>
Where <debug_type> is one of imap, maildir or thread. Debugging imap and maildir are, by far, the most useful.
-u <ui>
Where <ui> is one of CURSES.BLINKENLIGHTS, TTY.TTYUI, NONINTERACTIVE.BASIC, NONINTERACTIVE.QUIET or MACHINE.MACHINEUI. TTY.TTYUI is sufficient for debugging purposes.
Note: More recent versions use the following for <ui>: blinkenlights, ttyui, basic, quiet or machineui.

Folder could not be created

In version 6.5.3, offlineimap gained the ability to create folders in the remote repository, as described here.

This can lead to errors of the following form when using nametrans on the remote repository:

ERROR: Creating folder bar on repository foo-remote
  Folder 'bar'[foo-remote] could not be created. Server responded: ('NO', ['[ALREADYEXISTS] Duplicate folder name bar (Failure)'])

The solution is to provide an inverse nametrans lambda for the local repository, e.g.

~/.offlineimaprc
[Repository foo-local]
nametrans = lambda foldername: foldername.replace('bar', 'BAR')

[Repository foo-remote]
nametrans = lambda foldername: foldername.replace('BAR', 'bar')
  • For working out the correct inverse mapping. the output of offlineimap --info should help.
  • After updating the mapping, it may be necessary to remove all of the folders under $HOME/.offlineimap/ for the affected accounts.

SSL fingerprint does not match

ERROR: Server SSL fingerprint 'keykeykey' for hostname 'example.com' does not match configured fingerprint. Please verify and set 'cert_fingerprint' accordingly if not set yet.

To solve this, add to ~/.offlineimaprc (in the same section as ssl = yes) one of the following:

  • either add cert_fingerprint, with the certificate fingerprint of the remote server. This checks whether the remote server certificate matches the given fingerprint.
cert_fingerprint = keykeykey
  • or add sslcacertfile with the path to the system CA certificates file. Needs ca-certificates installed. This validates the remote ssl certificate chain against the Certification Authorities in that file.
sslcacertfile = /etc/ssl/certs/ca-certificates.crt

See also